Iris is the personification of the rainbow. She is the Goddess of the sea and the sky, and one of the messengers of the Gods. She is also representative of communication and new endeavours.
Being Goddess of the sea and the sky, she can travel anywhere on the planet in the blink of an eye. And speaking of eyes, the iris is named after her (funnily enough!), to represent all of the different colours that eyes can actually be.
This is a PowerPoint / Bryce 3D mish-mash, which is the next stop-off point on my tour of Mount Olympus, which you can just about see in the background there!